Kusaide has spent three years admiring Nakashima Kanoko, a teacher who bears a striking resemblance to his first love. Upon learning that she will soon be transferred to another school, he decides to take a bold risk during their daily train commute. However, after a vivid and erotic encounter, Kusaide realizes the entire experience was merely a fantasy, leaving him determined to create actual memories before she is gone for good.
Kusaide-kun harbors a deep obsession with Nakashima-sensei, who reminds him of a beloved teacher from his past. Driven by the news of her upcoming transfer, he indulges in a vivid, erotic fantasy of a forbidden encounter in the school infirmary. However, the dream is abruptly interrupted by a train announcement, revealing that the entire experience was merely a daydream, fueling his determination to make his fantasies a reality.
Driven by a lifelong obsession with his former high school teacher, a man encounters a lookalike who is about to be transferred to another school. Taking advantage of her drunken state during a train ride, he descends into a delusional fantasy, convincing himself she is the teacher's daughter as he forces himself upon her to create one final, twisted memory.
Three years after fleeing her hometown to escape a disturbing stalker, Nakashima-sensei starts over as a teacher at an all-girls high school. Her new life is shattered when the obsessed man tracks her down and corners her on a deserted limited express train. Driven by a delusional sense of fate, he violently assaults her and declares that she now belongs to him forever.